Rock drill and hydraulic drilling control system thereof

Abstract

The invention discloses a hydraulic drilling control system of a rock drill. The hydraulic drilling control system of the rock drill comprises a pumping device, an oil tank, a revolving motor, a pushing oil cylinder and an impact device; and a throttling valve is arranged between a working oil port of a revolving reversing valve and an oil port of the revolving motor. The hydraulic drilling control system of the rock drill further comprises a sequence valve, a hydraulic control reversing valve and a hydraulic control unbalanced cone valve; two working oil ports of the hydraulic control unbalanced cone valve respectively communicate with a rodless cavity of the pushing oil cylinder and the oil tank; the sequence valve can control the hydraulic control reversing valve to switch oil inlet directions of a rod cavity and the rodless cavity of the pushing oil cylinder according to the pressure change at an oil inlet thereof and meanwhile control an on-off state of the hydraulic control unbalanced cone valve to enable the rodless cavity of the pushing oil cylinder to directly communicate with the oil tank. The jamming of a drill bit can be stably and efficiently prevented; and the hydraulic control unbalanced cone valve with high circulating capacity is additionally arranged to reduce a back pressure value on the rodless cavity side in retreating of the pushing oil cylinder and to accelerate the system response speed. The invention further discloses the rock drill comprising the hydraulic drilling control system.

Description

technical field [0001] The invention relates to the field of rock drilling equipment, in particular to a hydraulic drilling control system of a rock drilling machine. In addition, the present invention also relates to a rock drilling machine comprising the above-mentioned hydraulic drilling control system. Background technique [0002] Hydraulic rock drills are important hard rock drilling equipment in modern drilling and blasting tunnel construction. Due to their advantages such as fast rock drilling speed, high rock drilling power, high construction efficiency, low noise radiation and easy automation, they occupy the leading position in the rock drill market. status. The hydraulic rock drill is a rotary impact drilling rock drill. During rock drilling, if the propulsion pressure of the rock drill is too small, it will cause air strike, which will not only reduce the rock drilling efficiency, but also shorten the service life of the rock drill; The bit deviates from the t...

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Problems solved by technology

[0003] In the prior art, the pressure control of the impact and propulsion system has extremely discrete control, and the working parameters of the system cannot be continuously changed according to the load. The rock drilling control system cannot timely predict the possible situations of drill sticking, bit sticking, driving into cavities, and faults. When drilling in areas with poor geological continuity, it is easy to get stuck, and the efficiency of rock drilling is low

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